CN219140774U

CN219140774U - Fuming furnace burner using natural gas as fuel

Info

Publication number: CN219140774U
Application number: CN202223518501.8U
Authority: CN
Inventors: 宋兴诚; 李正永; 唐都作; 袁海滨
Original assignee: Yunnan Tin Industry Co ltd
Current assignee: Yunnan Tin Industry Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-06-06
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a fuming furnace burner using natural gas as fuel, which comprises: a combustion-supporting air pipe and a natural gas pipe; the two ends of the combustion-supporting air pipe are in a mouth shape, one end of the combustion-supporting air pipe is a gas outlet, and the other end of the combustion-supporting air pipe is a steel drill inlet; a combustion air inlet and a natural gas inlet are formed in the side wall of the combustion air pipe; the head of the natural gas pipe is arranged in the combustion air pipe and is close to the position of the gas outlet; the tail of the natural gas pipe penetrates through the natural gas inlet and is positioned outside the natural gas inlet. The fuming furnace burner provided by the utility model can improve the fuming smelting efficiency, reduce the fuming metal loss and improve the fuming product quality.

Description

Fuming furnace burner using natural gas as fuel

Technical Field

The utility model relates to the technical field of molten pool smelting equipment, in particular to a fuming furnace burner using natural gas as fuel.

Background

The fuming furnace is a metallurgical furnace for fuming and volatilizing valuable metals in the field of nonferrous metal metallurgy.

For many years, fuming furnaces mainly use pulverized coal with granularity less than 200 meshes and moisture less than 1% as fuel. Coal is economical and practical and is easy to obtain as fuel, but the disadvantage is also very remarkable. The main problem of using coal as fuel is that firstly, the calorific value is lower, the consumption is large and the smelting efficiency is low; secondly, a large amount of ash is brought into the metallurgical melt, so that the difficulty in controlling slag forming components is increased, and the slag quantity is increased, so that the recovery rate of fuming metal is reduced; thirdly, ash is carried into the smoke dust product generated by volatilization, so that the purity of the smoke dust product is reduced; fourthly, the emission of CO2 is high, which is not beneficial to reducing the emission of greenhouse gases and does not meet the requirement of green development.

Therefore, the fuming furnace burner using natural gas as fuel, which can improve the fuming smelting efficiency, reduce the fuming metal loss and improve the quality of the fuming product, is a problem to be solved by the person skilled in the art.

Disclosure of Invention

In view of the above, the utility model provides a fuming furnace burner using natural gas as fuel, which can improve the fuming smelting efficiency, reduce the loss of fuming metal and improve the quality of fuming products.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a fuming furnace burner using natural gas as fuel, comprising:

the two ends of the combustion-supporting air pipe are in a mouth shape, one end of the combustion-supporting air pipe is a gas outlet, and the other end of the combustion-supporting air pipe is a steel drill inlet; a combustion air inlet and a natural gas inlet are formed in the side wall of the combustion air pipe;

the head of the natural gas pipe is arranged in the combustion-supporting air pipe and is close to the gas outlet; the tail of the natural gas pipe penetrates through the natural gas inlet and is positioned outside the natural gas inlet.

The technical scheme has the beneficial effects that the natural gas is used as the fuel of the fuming furnace, firstly, the calorific value is higher, the consumption is small, the smelting efficiency is high, and the smelting productivity of the fuming furnace can be greatly improved; and natural gas is directly sprayed into the vicinity of a molten pool at the outlet end of the burner and mixed with combustion air for combustion, so that the combustion is complete, tempering is avoided, and the burner is safe and reliable.

Preferably, an end cover is buckled at the natural gas inlet, and the tail part of the natural gas pipe penetrates through the end cover. The end cover can seal the natural gas inlet to prevent natural gas leakage.

Preferably, the tail part of the natural gas pipe is provided with a natural gas check valve, and the natural gas check valve is positioned outside the natural gas inlet. The natural gas check valve may prevent backflow of natural gas.

Preferably, the tail of the natural gas pipe is connected with a purge gas branch pipe, and the purge gas branch pipe is positioned between the natural gas check valve and the end cover. The residual natural gas in the natural gas pipe can be blown out through the sweeping gas when the combustion is stopped every time, so that potential safety hazards caused by the natural gas left in the pipe are prevented.

Preferably, the purge gas branch pipe is provided with a purge gas check valve. The purge gas check valve may prevent the purge gas from flowing back.

Preferably, the drill rod inlet is provided with a ball check valve. The non-return ball valve can prevent combustion air from flowing back, and meanwhile foreign matters such as slag bonding in the burner are conveniently cleaned through steel drills, so that smoothness of the burner is ensured.

Preferably, the distance between the head of the natural gas pipe and the gas outlet is 3mm-5mm.

Preferably, the head of the natural gas pipe is tightly attached to the inner wall of the combustion air pipe and is connected with the inside of the combustion air pipe.

Preferably, the head of the natural gas pipe is inclined and inclined at 45 degrees to the central axis direction of the combustion air pipe. The natural gas pipe head is inclined, and natural gas can be mixed with combustion air in the middle direction of the natural gas pipe head, which can turn to the combustion air pipe.

Preferably, a flange connected with the fuming furnace body water jacket is arranged outside the combustion-supporting air pipe.

The application method of the fuming furnace burner using natural gas as fuel comprises the following steps:

1) Closing a purge gas branch pipe, opening a natural gas pipe and a combustion air pipe, calculating natural gas and combustion air by a DCS system, metering the natural gas and the combustion air by a valve station, respectively entering the natural gas pipe and the combustion air pipe, and directly spraying the natural gas and the combustion air into the vicinity of a molten pool at the outlet end of a burner for mixed combustion;

2) When the combustion is stopped, purging is needed, the natural gas pipe and the combustion air pipe are closed, the purging gas branch pipe is opened, purging gas is introduced into the natural gas pipe, and the residual natural gas in the natural gas pipe is blown out;

when the slag foreign matters in the combustion-supporting air pipe need to be removed, steel drills are introduced from the steel drill inlet for cleaning.

Compared with the prior art, the utility model discloses a fuming furnace burner using natural gas as fuel, which has the beneficial effects that:

(1) The natural gas is used as the fuel of the fuming furnace, has higher calorific value, small consumption and high smelting efficiency, and can greatly improve the smelting productivity of the fuming furnace; the ash is not brought into the metallurgical melt, slag forming components of the fuming furnace are easy to control, and the slag amount is not increased, so that the recovery rate of the fuming metal is improved; the ash is not carried into the smoke dust product generated by volatilization, so that the smoke dust product has high purity and good quality; the emission of CO2 generated by the natural gas is lower than that of other fuels such as coal, which is beneficial to reducing the emission of greenhouse gases and meets the green development requirement;

(2) The natural gas is directly sprayed into the vicinity of a molten pool at the outlet end of the burner and mixed with combustion air for combustion, so that the combustion is complete, tempering is avoided, and the burner is safe and reliable;

(3) The natural gas head is provided with the natural gas check valve for preventing natural gas from flowing back, and is provided with the purging gas branch pipe and the purging gas check valve for purging when combustion is stopped each time, so that potential safety hazards caused by natural gas left in the pipe are prevented;

(4) The front section of the straight pipe of the combustion-supporting air pipe is provided with the ball check valve, so that the backflow of combustion-supporting air can be prevented, foreign matters such as slag and the like possibly entering the burner in the cleaning and using process can be conveniently introduced by using the steel drill rod, and the smoothness of the burner is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the internal structure of a burner of a tempering furnace.

Wherein, in the drawing,

1-a combustion-supporting air pipe;

11-gas outlet; 12-drill steel inlet; 13-combustion air inlet; 14-natural gas inlet;

2-natural gas pipe; 3-end caps; 4-natural gas check valve; 5-sweeping the gas branch pipe; 6-purge gas check valve; 7-a ball check valve; 8-flange.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model discloses a fuming furnace burner using natural gas as fuel, which comprises the following steps:

the two ends of the combustion air pipe 1 are in a mouth shape, one end of the combustion air pipe 1 is provided with a gas outlet 11, and the other end is provided with a steel drill inlet 12; a combustion air inlet 13 and a natural gas inlet 14 are formed in the side wall of the combustion air pipe 1;

the head of the natural gas pipe 2 is arranged in the combustion air pipe and is close to the gas outlet 11; the tail of the natural gas pipe 2 extends through the natural gas inlet 14 and is located outside the natural gas inlet 14. The tail part of the natural gas pipe 2 is connected with a natural gas source.

In order to further optimize the technical scheme, the end cover 3 is buckled at the natural gas inlet 14, and the tail part of the natural gas pipe 2 penetrates through the end cover 3. The end cap 3 is in sealing connection with the natural gas inlet 14.

In order to further optimize the technical solution, the tail of the natural gas pipe 2 is provided with a natural gas check valve 4, and the natural gas check valve 4 is positioned outside the natural gas inlet 14.

In order to further optimize the technical scheme, the tail of the natural gas pipe 2 is connected with a purging gas branch pipe 5, and the purging gas branch pipe 5 is positioned between the natural gas check valve 4 and the end cover 3. The purge gas branch pipe 5 is connected with a purge gas source, and the purge gas is nitrogen or compressed air.

In order to further optimize the technical scheme, a purge gas check valve 6 is arranged on the purge gas branch pipe 5.

In order to further optimize the technical proposal, a ball check valve 7 is arranged at the drill steel inlet 12.

In order to further optimise the above technical solution, the head of the natural gas pipe 2 is 3mm-5mm from the gas outlet 11.

In order to further optimize the technical scheme, the head of the natural gas pipe 2 is tightly attached to the inner wall of the combustion air pipe 1 and is connected with the inside of the combustion air pipe 1.

In order to further optimize the technical proposal, the head of the natural gas pipe 2 is inclined and inclined by 45 degrees towards the central axis direction of the combustion air pipe 1. The outer side wall of the natural gas pipe 2 is welded with the inner side wall of the combustion air pipe 1.

In order to further optimize the technical scheme, the outside of the combustion air pipe 1 is provided with a flange 8 connected with a fuming furnace body water jacket. The flange 8 is arranged to facilitate the connection of the burner and the fuming furnace body water jacket.

1) Closing a purge gas branch pipe 5, opening a natural gas pipe 2 and a combustion air pipe 1, calculating natural gas and combustion air by a DCS system, metering the natural gas and the combustion air by a valve station, respectively entering the natural gas pipe 2 and the combustion air pipe 1, and directly spraying the natural gas and the combustion air into the vicinity of a molten pool at the outlet end of a burner for mixed combustion;

2) When the combustion is stopped, purging is needed, the natural gas pipe 2 and the combustion air pipe 1 are closed, the purging gas branch pipe 5 is opened, purging gas is introduced into the natural gas pipe 2, and residual natural gas in the natural gas pipe 2 is blown out;

3) When the slag foreign matters in the combustion air pipe 1 need to be removed, steel drills are introduced from the steel drill inlet 12 for cleaning.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuming furnace burner using natural gas as fuel, comprising:

the two ends of the combustion air pipe (1) are in a mouth shape, one end of the combustion air pipe is provided with a gas outlet (11), and the other end of the combustion air pipe is provided with a steel drill inlet (12); a combustion air inlet (13) and a natural gas inlet (14) are formed in the side wall of the combustion air pipe (1);

the head of the natural gas pipe (2) is arranged in the combustion-supporting air pipe and is close to the gas outlet (11); the tail of the natural gas pipe (2) penetrates through the natural gas inlet (14) and is positioned outside the natural gas inlet (14).

2. A fuming furnace burner according to claim 1, wherein the natural gas inlet (14) is provided with an end cap (3) and the tail of the natural gas pipe (2) extends through the end cap (3).

3. A fuming furnace burner according to claim 2, wherein the tail of the natural gas pipe (2) is provided with a natural gas check valve (4), the natural gas check valve (4) being located outside the natural gas inlet (14).

4. A fuming furnace burner according to claim 3, wherein the tail of the natural gas pipe (2) is connected with a purge gas branch pipe (5), the purge gas branch pipe (5) being located between the natural gas check valve (4) and the end cap (3).

5. A natural gas fuelled fuming furnace burner as claimed in claim 4, wherein the purge gas branch pipe (5) is provided with a purge gas check valve (6).

6. A fuming furnace burner according to any one of claims 1-5, wherein the drill steel inlet (12) is provided with a ball check valve (7).

7. A natural gas fuelled fuming furnace burner as claimed in claim 6, wherein the head of the natural gas pipe (2) is 3mm to 5mm from the gas outlet (11).

8. A fuming furnace burner according to claim 7, wherein the head of the natural gas pipe (2) is in close contact with the inner wall of the combustion air pipe (1) and is connected to the inside of the combustion air pipe (1).

9. A fuming furnace burner according to claim 8, wherein the head of the natural gas pipe (2) is inclined at 45 ° to the central axis of the combustion air pipe (1).

10. A fuming furnace burner according to claim 9, characterized in that the outside of the combustion air duct (1) is provided with a flange (8) connected to the fuming furnace body water jacket.